Pole gaining machine



Aug. 29, 1950 G, v, COQK 2,520,457

POLE-GAINING MACHINE Filed Nov. 28, 1947 l 11H "|\|"|l Z7 ill u 57.97,e6 2G Ml. im U. HH/2l /7 i /7 INVENTOR.

/6 Gaaf/e7 1./ 600K /5 /5 By I l Q I ATTORNEY atentecl ug. 29, 1.950

UNITED STATES PATENT OFFICE# `:2,520,457 j POLE GAIMNG MACHINE GilbertVivian Cook, Denver, Colo.

Application November 28, 1947, Serial No. 788,362 2 claims. `(o1.14e-133) This invention relates to a pole gaining machine, that is, to adevice for notc'hing telephone, telegraph, and electric pole line polesfor the reception of the wire-carrying cross arms. Such poles areprovided with one or more horizontally extending notches or gains of awidth to snugly receive a cross arm. The cross arm is secured in thegain by means of a single cross arm bolt extending through the pole. Thegains are usually formed by hand. The hand operation is a slow, tediousone, and unless done by experts, results in gains of varying widths andvarying inclines.

'Ihe principal object of this invention is to `provide an economical andhighly eilicient motor-driven machine which will rapidly and accuratelyform the gains in the poles at the desired points so as to eliminatehand labor and obtain accurate gains.

Another object of the invention is to so construct the device that itwill automatically ad-` just itself to accurately form gains in poles ofvarious sizes and various tapers.

Other objects and advantages reside in the detail construction of theinvention, which is designed for simplicity, economy, and eiiiciency.These will become more apparent from the following description.

In the following detailed description of the invention, reference is hadto the accompanying drawing which forms a part hereof. Like numeralsrefer to like parts in all views of the drawing and throughout thedescription.

In the drawing:

Fig. 1 is a side elevation of the improved pole gaining machine, as itwould appear in use;

Fig. 2 is a plan View thereof;

Fig. 3 is a front view; and

Fig. 4 is a detail section, taken on the line 4 4, Fig. 2.

In the drawing, a conventional pole is indicated at III. The pole iscarried on a dolly II provided with track wheels I 2 running uponsuitable track rails I3. The pole is supported on the dolly upon rollersI4, which allow it to be rotated to place any selected side of the poleupwardly. The improved pole gaining machine is also mounted on trackrails I5 extending at right angles to the rails I3.

The machine comprises a carriage I6 supported from the rails I5 upontrack wheels I1. The carriage is provided with transversally alignedbearings I8. A tubular boom I9 is supported by the carriage. The boom I9is provided intermediate its extremities with two sdewardly exsleeve 23which is slipped overthe forward ex-l tremity of the boom 9 andpositioned between two set collars 24. A U-shaped yoke plate 25 iswelded or otherwise secured to the sleeve 23 with its furcationsextending forwardly therefrom;

The furcations of the yoke 23 each carries a shaft bearing 26, throughwhich` a rotatable shaft 2 extends carrying a pluralityof dado blades 28intermediate the bearings 2B, The

shaft 2l is rotated through the medium of a` driven pulley 29, fromwhich an endless belt .3&3 extends to a drive pulley 3| mounted on theshaft of the motor 22.

A side plate 32 extendsupwardly from each side of the yoke plate 25 tosupport a cross hinge member 33. A connecting rod 34 extends from thecross hinge member 33 to a second cross hinge member 35, which issupported. from the carriage I6 upon bracket arms 36. The cross members33 and 35 are positioned directly above the shafts 21 and 20,respectively, the distance between the shafts and the cross membersbeing uniform. With this arrangement a parallelogram is formed whichmaintains the side plates 32 vertical at all angular positions of theboom I9.

The lower edges of the side plates 32 are turned outwardly to formflanges 3l, from each of Which a horizontal runner 38 is suspended uponadjustable suspension bolts 39. Handle brackets 4I! extend forwardlyfrom the flanges 31 to support a handle bar 4I.

In operation, the pole is moved along the rails I3 to the properposition for a cross arm gain. The pole is rotated on the rollers I4 toplace the selected side upward. The operator then pulls downwardly onthe handle bar 4I, to bring the rotating dado blades against the pole.The handle 4I is then moved forwardly and backwardly, the runners 38sliding upon the pole, and the carriage I6 moving on the rails I5, toquickly cut a gain across the top side of the pole.

It is desired to call attention to the fact that the entire working headmay rotate upon the boom I9 to accommodate any taper in the pole. Thedepth desired for the gain is pre-set by regulating the suspension bolts39, to set the runner at any desired spacing above the lower edges ofthe dado blades 28. The stub shafts 20 are so positioned relative to theextremities of the boom I9 so that the weight of the motor 22 willslightly over balance the weight of the Working head so that when the:handlebar is released" the dado/v blades will rise from the pole andL sothat very little effort will be required to bring the blades to thework.

While a speoic form of the improvementl has f been described andillustrated herein, it is desired to be understood that the same may"beA varied, within the scope of the appendedclaims, without departingfrom the spirit of the invention.

Having thus describedj the invention, what is claimedtand desired:secured by LetterssPatent is:Vv

1. `A machinefor forming` cross` arm receiving gains inpoles comprisinga carriage, bearings carried'L by, said carriage. a. boom.. extending.lona situdinally of. said, carriage and projecting from` the front andrear ends thereof, stub .shafts pr-.oletting,fromopposite` sidesgof,saidboom and rotatablyjY received in., saidA bearings,` to pivotallymount, the boom, for. vertical tiltngfmovement, la. motor at therearAend. o`thelboom,asle eve loosely, mounted aboutA the forward-A portionof. said. boo.m a yoke` carried by` thev sleeve and having legsprojecting, forwardly fromtheV front erniof` the boom, la`^ saw,` shaft'rotatably: mounted.; across, the front ends oj the legisI of said yoke,blades .oar-- ried1by the shaft between the legsoi thel yoke. and'spaced from each other longitudinally of.' the1r shaft, means fortransmittingrotary. motionfrom theirnotor to the lsaw shafts ide platesloose about sai'dgsaw shaft and proj ectingupwardly atopposite,sidestofsaidyoka a front crossbar. extend-,f ing; between the upperendfsoffsaid platesandr tatably.. supported thereby, Y brackets vrisingfrom`V4 said' carriage with their upper ends d'isposed'looverrv` saidbearings, a` rear cross bar rotatably Supported over the stub shafts bysaid brackets, a rod connecting the cross bars an'dbeing spaced upward,-lyffrom'said boormoutstandinjg sideflanges along frontend portion of theboom ciroumferentially thereof and having legs projecting forwardlyfromV thevboom at opposite sides thereof, a saw shaft rotatably mountedacross the legs 'and extending therebetween, blades carried by the sawshaft andfdisposed between the legs of the yoke in spaced relation toeach other longitudinally of the shaft,A plates4 at opposite sides: of-vthe` yoke tiltably mounted about the saw.l shaft andpr jecting,Vupwardly from the yoke, brackets rising',k

fromsaidcarriage with theiry upper endsedisposed over; thef horizontalaxis ofthe boom, a. rod. ex'.-l tending. longitudinally ofthe boom inupwardlyspaced parallelrelation thereto and, having cross; bars at. itsfront., andrearY ends rotatably engaged;- wit-hthe upperends-of theplates andfthe'brack ets, flanges along the-lower` edges of thelplates,arms projecting forwardly from. said'anges. a=

handle bar carried by therfront ends of said= arms,i

and runners supported under said flangesandadf instable vertically.

GILBERT VIVIAN COGJK REFERENCES CITED',

TheV following; references are: of recordf in .thea le of this patent:

UNITED STATES PATENTS Number Name. Date 413,073' Luther s. Oct.` 15,A827,548T Martin l, July 3l, 1,906 1',25 l',1'7'7V Toohey Jan. 22,,1Q-,1li 1,547,096 Crouse i July 21 41925 25,064,017' Ilesohenv Dec151`936` 2,439,607 Irwin Apr..1,319l3iv

